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Cornerstone · Grades 3–5 Keystones #1 4 November 2011 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 November 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄8 + 1⁄3

    Answer: 17⁄24
  2. 2. Algebra Two-step equations

    Solve: 6x + 5 = 47

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 95 in the ratio 2:2:1

    Answer: 38, 38 and 19
  5. 5. Statistics Mean

    Find the mean of: 11, 9, 9, 11

    Answer: 10

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